Wintersteiner rosettes

Win·ter·stei·ner ro·settes

rosettes found only in retinal embryonic tumors, formed by a group of columnar cells with a peripheral basement membrane arranged in a radial manner around a central cavity, the spokes corresponding to the photoreceptors.

Wintersteiner,

Hugo, Austrian ophthalmologist, 1865-1918.
Wintersteiner rosettes - found only in retinal embryonic tumors.